Hetzner has this for quite a while now.
Disclosure: I work at Google Cloud (but not in networking / would know the answer)
[1] https://www.lowendtalk.com/discussion/70274/hetzner-new-ex41...
[1] https://www.hetzner.de/en/hosting/unternehmen/rechenzentrum
Been a Hetzner customer for years now
I had several servers from them over the years without issues and great performance.
Never been DDOSed though...